Bon holiday gift money
Money given to children by parents or grandparents during the Bon holiday, analogous to お年玉 for New Year's.
I gave Bon holiday gift money to my grandchild who came home for the Bon festival.
Recently, more families are giving Bon holiday gift money.
Compound of お盆 (Bon festival) and 玉 (ball, jewel), modeled after お年玉 (New Year's gift money). The term is relatively modern and not historically deep.